Yammer founder and CEO David Sacks came all the way from his office upstairs from us to talk about his new $25 million round of funding. We discuss a lot of interesting things in this clip including why Sacks says Yammer wasn&'t everyone&'s new favorite word, a pivot' why he still loves Geni, the company Yammer spun out of that we don&'t hear nearly as much about' why more social-media-for-the-enterprise companies haven&'t taken off' and his defense of the freemium business model.

Make sure you stay to the end, when I ask Sacks about a rumor floating around Silicon Valley that he tried to put a deal together with Yammer and Twitter back before the company even launched. Bonus: Sacks- as tactfully as possible- says what TechCrunch&'s Yammer usage tells us about our company culture.